Fixed issue with sidebar edit links toggling anchor

This caused an issue with the page scrolling from the bottom to the top. Also stopped the dropdown links doing the same.

app/assets/javascripts/issuable_context.js.coffee

@@ -9,21 +9,30 @@ class @IssuableContext
     $(".issuable-sidebar .inline-update").on "change", ".js-assignee", ->
       $(this).submit()
 
-    $(document).off("click", ".edit-link").on "click",".edit-link", (e) ->
-      $block = $(@).parents('.block')
-      $selectbox = $block.find('.selectbox')
-      if $selectbox.is(':visible')
-        $selectbox.hide()
-        $block.find('.value').show()
-      else
-        $selectbox.show()
-        $block.find('.value').hide()
-
-      if $selectbox.is(':visible')
-        setTimeout (->
-          $block.find('.dropdown-menu-toggle').trigger 'click'
-        ), 0
-      
+    $(document)
+      .off 'click', '.dropdown-content a'
+      .on 'click', '.dropdown-content a', (e) ->
+        e.preventDefault()
+
+    $(document)
+      .off 'click', '.edit-link'
+      .on 'click', '.edit-link', (e) ->
+        e.preventDefault()
+
+        $block = $(@).parents('.block')
+        $selectbox = $block.find('.selectbox')
+        if $selectbox.is(':visible')
+          $selectbox.hide()
+          $block.find('.value').show()
+        else
+          $selectbox.show()
+          $block.find('.value').hide()
+
+        if $selectbox.is(':visible')
+          setTimeout ->
+            $block.find('.dropdown-menu-toggle').trigger 'click'
+          , 0
+
 
     $(".right-sidebar").niceScroll()